ASTM C1758 C1758M-2015 Standard Practice for Fabricating Test Specimens with Self-Consolidating Concrete《制作自密实混凝土试验用样本的标准实践规程》.pdf

1、Designation: C1758/C1758M 13C1758/C1758M 15Standard Practice forFabricating Test Specimens with Self-ConsolidatingConcrete1This standard is issued under the fixed designation C1758/C1758M; the number immediately following the designation indicates theyear of original adoption or, in the case of revi

2、sion, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice covers procedures for fabricating test specimens in the laboratory or field using a r

3、epresentative sample offresh self-consolidating concrete (SCC). This practice is applicable to SCC with a nominal maximum aggregate size up to 25 mm1 in. and a slump flow of 500 mm 20 in. or greater. If the slump flow is less than 500 mm 20 in. follow the fabricationprocedures described in the stand

4、ard for which the test specimen is required.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the

5、two systems may result in non-conformance with the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicabi

6、lity of regulatorylimitations prior to use. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposedskin and tissue upon prolonged exposure.2)1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and foot

7、notes(excluding those in tables and figures) shall not be considered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete AggregatesC172 Practice for Sampling Freshly Mixed ConcreteC192/C192M Practice for Making and Curing Conc

8、rete Test Specimens in the LaboratoryC1611/C1611M Test Method for Slump Flow of Self-Consolidating Concrete3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this practice, refer to Terminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 test specimen, nself-conso

9、lidating concrete placed in a mold, measure, measuring bowl, or other container following thisstandard with the top surface struck off and finished following the standard for which the test specimen is required.4. Significance and Use4.1 Existing practices and test methods for fabricating fresh conc

10、rete test specimens are not suited to SCC. This practiceprovides requirements and procedures for fabricating test specimens with SCC having a slump flow of 500 mm 20 in. or greater.5. Apparatus5.1 Specimen ContainerMolds, measures, measuring bowls, and containers used for fabricating test specimens

11、according tothis practice shall conform to the requirements described in the standard for which the test specimen is required.1 This practice is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.47 onSelf-Consolidati

12、ng Concrete.Current edition approved June 1, 2013Feb. 1, 2015. Published July 2013April 2015. Originally approved in 2011. Last previous edition approved in 20112013 asC1758/C1758M-11.-13. DOI: 10.1520/C1758_C1758M-13.10.1520/C1758_C1758M-15.2 See section on Safety Precautions, Manual of Aggregate a

13、nd Concrete Testing,Annual Book of ASTM Standards, Vol. 04.02.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website

14、.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior ed

15、itions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29

16、59. United States15.2 Sample ReceptacleApan or wheelbarrow that is water-tight, has a nonabsorbent surface, and is large enough to allow bothremixing of the entire sample and retain a volume of concrete sufficient to fill all necessary the specimen containers.container.5.3 Pouring Vessel for SCCA wa

17、ter-tight container having a size large enough so each amount of concrete obtained from thesampling receptacle is representative and small enough so concrete is volume such that concrete is not spilled during placementin the specimen container.NOTE 1A pouring vessel with a pouring lip is useful in r

18、educing the probability of concrete spilling while filling the specimen container.5.4 SmallOther ToolsItems such as shovels and scoops capable of remixing the concrete in the sample receptacle, filling thepouring vessel, or both.6. Sampling Concrete6.1 The sample of concrete from which test specimen

19、s are to be fabricated shall be representative of the entire batch. The sampleshall be obtained Obtain a sample of freshly mixed self-consolidating concrete in accordance with Practice C172, or PracticeC192/C192M., and place it in the sample receptacle.7. Procedure7.1 Measure and record the slump fl

20、ow of the sampled concrete in accordance with Test Method C1611/C1611M. For concretewith a slump flow of 500 mm 20 in. or greater, fabricate test specimens as follows.7.2 Identify, position, and prepare the specimen container, and any related equipment, as described in the practice or test methodfor

21、 which the test specimen is required.7.3 Fill Pouring VesselFill Immediately fill the pouring vessel with a representative portion of SCC from the samplereceptacle, either by passing the pouring vessel through the SCCconcrete or by scooping concrete into the vessel.7.4 Fill the specimen container wi

22、th SCC by tilting and then moving the pouring vessel around the perimeter of the containerto allow the SCC to flow into the container and to ensure an even distribution of concrete.7.4 Filling ProcedureDuring the filling process, position the Immediately fill the specimen container with SCC by tilti

23、ng thepouring vessel. Position the lowest point on the rim of the pouring vessel no more than 125 mm 5 in. above the top of thecontainer. If necessary, repeat the procedures inEnsure an even distribution of concrete, 7.3 and 7.4, without rodding the concreteor tapping the sides of the specimen conta

24、iner, until the container is overfilled slightly above its rim.while filling the container.7.5 If necessary, repeat the procedures in 7.3 and 7.4 until the specimen container is filled slightly above its rim.7.6 After filling, follow all subsequent specimen fabrication and testing procedures as spec

25、ified in the practice or test methodfor which the test specimen is required.8. Keywords8.1 fabricate; self-consolidating concrete; slump flow; specimen container; test specimensSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this test method since the last issue,C1

26、758/C1758M11,13, that may impact the use of this test method. (Approved Feb. 1, 2015June 1, 2013)(1) Old Note 1 moved to 1.1.(1) Revised 5.2, 5.3, 5.4, 6.1, 7.3, 7.4, and 7.5.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentio

27、nedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee an

28、d must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of

29、 theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box

30、C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 152